Hello can someone please help me with this problem ?​

Every time you drive you will experience a combination of driving conditions and environments.

Which expression is equivalent to 5r6141 2r+st6

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?